Question

If the radius of curvature of a convex lens is 50cm. what is its power.​

Answer 1

Answer:

0.5D

Explanation:

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Answer 2

Answer:

The power of the lens is 4D

Explanation:

Given that,

The radius of curvature of a concave lens is 50cm.

Hence its focal length would be half of its radius of curvature.Therefore,

$f=\frac{R}{2} =\frac{50}{2} =25cm$

The power of a lens is defined as the reciprocal of its focal length in meters.Hence we mathematically write it as shown below

$P=\frac{1}{f}$

Substituting the value of focal length in above relation,we get

$P=\frac{1}{0.25} =4D(dioptre)$

Therefore,the power of the lens is found to be 4D

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